Improvement in steam-engine governors



UNTTED STATES PATENT OEEICE.

H.. D. SNOW, OF ROCHESTER, NEW YORK.

A IMPROVEMENT IN STEAM-ENGINE GOVERNORS.

Specification forming part of Letters Patent N0. 44,466, dated September 27, 1864.

To @ZZ whom, L'may concern: y

Be it known thatI, H. D. SNow, ot Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Marine Governors; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a side elevation of my invention. Fig. 2 is a section taken through the plane indicated bythe red dotted line o in Fig. 1.

Similar letters of reference indicate corresponding parts in both gures.

The nature of my invention consists in the employment of steampressure to counteract the centrifugal force of the revolving balls as a substitute for a spring in this class of governors or for weights in those used for stationary engines, either of which devices is unreliable, and very apt to fail at times when the services ofthe governor are most needed, whereas by using steam for this purpose the action ofthe governor is just as constant and certain as the supply of power to run the engine.

'Io enable others skilled in this branch of mechanics to make and use my invention, I will describe its construction and operation.

A in the drawings represents the frame of the governor; B, the balls; (l, the steam pressure cylinder; D, the double ball-lever; E, the driving-shaft, which has its bearings in the frame A at Fand G, and through which the lever Dis pivoted. One end of the shaft E is drilled out, as seen in Fig. 2, to receive the sliding-shaft S, which is connected to the ball-lever D by two straps or links, J. This shaft S is provided with a hollow cylindrical head, H, into which are titted two rings, j' and g, the former being attached to the piston-rod R by the pin n, and the latter to the head H by the pin n. Between the rings may be placed one or more anti-friction plates, r.

'tion by the set-nuts a, &c.

The piston-rod enters the cylinder C through an ordinary stuffing-cup, K. The cylinder is cast with a projecting tlange, through which it is bolted to the head G of the frame A. The head H is iis-idly fixed to the rod R, l ut the packing-ring or follower b is kept in posi- The piston is connected with the throttle-valve rod by the coupling d. The composition journal-box O is bolted to the frame A. The movable collar or ring N is kept to its place by the pin n, and there should be an anti-friction washer, s, between it and the box and another one between the box and the hub of the drivingpulley P. The balls are securely xed to the lever by strong nuts let into the balls, the ends of the lever passing through to receive them. Steam is admitted to the pressure cylinder C through the pipe p. The shaft E is revolved by the pulley P. The pressure in the cylinder C is designed to counteract the centritugal force of the balls B and keep them in their present position, except as the speed of the shaft S is increased, when the correspondingly increased centrifugal power tends to force them into or toward the position indicated by the dotted lines at B. rIhe area ot` the piston-head H should be regulated with reference to the speed of the balls B and the pressure of the steam to be carried in the boiler. The-reis but one head required in the cylinder G. `A column of mercury opening into the cylinder O might be substituted for the steam, and would probably produce a similar effect.

What I claim as my invention, and desire to secure by Letters Patent, is-

The employment of steam-pressure in marine governors as a means for counterbalanc'- ing the centrifugal force of the revolving balls.

' H. D. SNOW.

Witnesses:

P. T. TURNER, WM. S. LoUeHEoRoUGH. 

